preceded_by Platynereis life cycle stage mid nectochaete stage late nectochaete stage 6d-2w ln At a temperature of 18 C this stages lasts from 96.00 hours till 168.00 hours. Developmental stage following Mid-nectochaete stage with the following key events: Antennae elongate, palpi become visible, beginning of food intake. The antennae become long and slender. Palpi form on both sides of the mouth opening. The gut becomes functional and the larvae begin to feed. The midgut lumen is only slit-like. Lipid droplets begin to be resorbed to variable degree. Jaws grow rapidly and a secondary tooth is added. Transition progresses from pelago-benthic to fully benthic lifestyle. Brain continues to grow rapidly. Two additional serotonergic cells in the brain. Musculature around the stomodeum increases in complexity and a basket of muscles develops around the jaws to form the pharynx. Muscles and nerves, which are associated with the developing antennae, tentacular cirri, palpi and anal cirri increase in length. End of synchronized development. PdumDv:0001300 platynereis_stage